Symfony\Component\DependencyInjection\Dumper\PhpDumper::hasReference PHP Method

    private function hasReference($id, array $arguments, $deep = false, array &$visited = array())
    {
        foreach ($arguments as $argument) {
            if (is_array($argument)) {
                if ($this->hasReference($id, $argument, $deep, $visited)) {
                    return true;
                }
            } elseif ($argument instanceof Reference) {
                $argumentId = (string) $argument;
                if ($id === $argumentId) {
                    return true;
                }

                if ($deep && !isset($visited[$argumentId]) && 'service_container' !== $argumentId) {
                    $visited[$argumentId] = true;

                    $service = $this->container->getDefinition($argumentId);

                    // if the proxy manager is enabled, disable searching for references in lazy services,
                    // as these services will be instantiated lazily and don't have direct related references.
                    if ($service->isLazy() && !$this->getProxyDumper() instanceof NullDumper) {
                        continue;
                    }

                    $arguments = array_merge($service->getMethodCalls(), $service->getArguments(), $service->getProperties());

                    if ($this->hasReference($id, $arguments, $deep, $visited)) {
                        return true;
                    }
                }
            }
        }

        return false;
    }